in washington, the senate votes down a bill on expanding background checks and a furious president obama calls it shameful. >> while this compromise didn't contain everything i wanted or everything these families wanted, it did represent progress. it represented moderation and common sense. that's why 90% of the american people supported it. but instead of supporting this compromise, the gun lobby and its allies willfully lied about the bill. >> we'll have more on that later in the show. and the arrest in the ricin case. we begin with jake tapper live from boston where the president will travel for an interfaith service tomorrow in memory of the victims. jake, a pretty chaotic day in many ways. lots of claim, counterclaim, leak, counter leak. where are we now, 9:00 p.m. eastern, there has been no arrest as we speak. but what has there been today in terms of development? >> reporter: well, we know that there has been some -- there have been some advances made in the investigation. specifically through videotape obtained from the lord & taylor store in copley square, not far from where i'm